For those who have heard them, how about any of their other releases besides these three?[/QUOTE]
I also have the double CD "Stars Die- the Delerium Years" which gives you an idea of how Steve Wilson's musical inclinations have evolved over the 15+ years he's been in the business. I'll give it 3 out of 5 stars since many of the songs drag for a little too long, and the drumming in general- and especially in the earlier tracks, is sub par IMO (I think Wilson was playing everything back then, but I'm not sure). I bought it mainly for "Waiting" and out of curiosity after cumpulsively listening Deadwing repeatedly. Other noteworthy songs here are: Radioactive Toy, and Stars Die (very Pink Floyd-esque). Even though it's a double CD, it's priced reasonably.
I too like Deadwing better than In Absentia, even though I'm not into metal. I think Porcupine Tree's blend of rock sub-genres is very tasteful. The production is pretty much the best in rock. Unfortunately I can't speak about the multichannel versions.
By the way, those in the US, they're gonna be touring this fall along with Fripp and Belew as ProjeKct 6. Check their website for dates.
Thanks for the Kino recommendation, I've heard about it and I'll definitely check them out soon.